(1) in glycolysis, which reactions involve phosphorylation with ATP? (a) glucose
ID: 933307 • Letter: #
Question
(1) in glycolysis, which reactions involve phosphorylation with ATP? (a) glucose to glucose -6-phosphate, fructose-6-phosphate to fructose-1,6-bisphosphate and phosphoenolpyruvate to pyruvate. (b) glucose to glucose -6-phosphate and fructose -6_ phosphate to fructose -1,6- bisphosphate (c) fructose -6-phosphate to fructose-6,6-bisphosphate and glyceraldehyde-3-phosphate to 1,3- bisphosphoglycerate. (d) 1,3- bisphosphoglycerate and phosphoenolpyruvate to pyruvate (2) which reactions involve a direct substrate phosphorylation to generate ATP? (a) glucose to glucose -6-phosphate and fructose -6-phosphate to fructose-1,6- bisphosphate (b) glyceraldehyde -3-phosphate to 1,3-bisphosphoglycerate (c) phosphoenolpyruvate to pyruvate, 1,3-bisphosphoglycerate to 3-phosphoglycerate and glucose to glucose -6-phosphate (d) 1,3- bisphosphoglycerate to 3-phosphoglycerate and phosphoenolpyruvate to pyruvate
Explanation / Answer
1.(a) glucose to glucose -6-phosphate, fructose-6-phosphate to fructose-1,6-bisphosphate and phosphoenolpyruvate to pyruvate.
Glucose + ATP4- -----> Glucose-6-phosphate2-+ADP3-+H+
Fructose-6-phosphate2-+ATP4-------> Fructose1,6-biphosphate4-+ ADP3-+H+
2.(d) 1,3- bisphosphoglycerate to 3-phosphoglycerate and phosphoenolpyruvate to pyruvate
1,3-Bisphosphoglycerate4-+ ADP3-----> 3-phosphoglycerate3-+ATP4-
phosphoenolpyruvate3-+ ADP3-+H+-----> pyruvate+ATP4-
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